JP2885998B2 - Surface transparent sheet for construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to improve the design of essential or metallic substrates such as furniture, indoor fittings, exteriors of light electrical appliances, wall coverings and interior materials such as elevators, etc. The present invention relates to a surface-mounting synthetic resin sheet to be bonded to improve durability and the like, and particularly to a transparent sheet used as the outermost layer of the surface-mounting synthetic resin sheet.

[0002]

BACKGROUND ART plywood or consisting particle board <br/> wood substrate or for surface design quality and durability of the metal substrate made of steel or aluminum plate, denominated wearing composite sheet to be bonded is generally It is called a doubling sheet. A semi-rigid PVC colored opaque sheet is printed with a pattern such as wood grain, and a semi-rigid PVC transparent sheet is laminated on the printed layer by thermocompression bonding or an adhesive. The surface of the sheet layer is subjected to an uneven process called embossing, and a sub-ring sheet is completed. As described above, as the doubling sheet, a semi-rigid PVC sheet is generally used for both the colored opaque sheet of the F layer and the transparent sheet of the upper layer. Semi-rigid PVC
The reason why the sheet is used is that it is a general-purpose resin, and it is easy to color, good in printing, good in laminating, easy in embossing, and vacuum forming, in addition to its low manufacturing cost. The greatest reason is that the ease of secondary and tertiary workability such as workability, drawing workability, bending workability, etc. is better or balanced compared to other resins. However, in connection with recent environmental problems, the generation of hydrochloric acid gas during the combustion of PVC is unavoidable, and the use of cadmium-free metal soap such as cadmium used as a stabilizer etc. And sheets other than PVC which do not contain heavy metals are being demanded. In addition, the two disadvantages of the semi-rigid PVC sheet are that the weather resistance is insufficient and it is difficult to use it outdoors, and that the surface is easily contaminated by the addition of a plasticizer. In some cases, a fluororesin, an ethylene-vinyl acetate copolymer saponified resin, or the like is further laminated on the outermost surface layer of the semi-rigid PVC sheet to correspond to the case.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a surface sheet of a composite sheet for construction, and more particularly to a building sheet which does not contain a halogen element or heavy metal without impairing the secondary and tertiary workability of a semi-rigid PVC sheet. An object of the present invention is to provide a wearing surface transparent sheet.

[0004]

Means for Solving the Problems The present invention is directed to a wooden substrate made of plywood or particle board, or a metal substrate made of a steel plate or an aluminum plate (hereinafter referred to as a substrate). And a transparent sheet used as the outermost layer of a composite sheet for building that can be attached to improve durability, and has a two-layer structure of a saturated polyester resin layer and a butyl acrylate copolymerized polymethyl methacrylic resin layer. It is a surface transparent sheet for building. The saturated polyester resin layer (hereinafter, referred to as a PET layer) is obtained by condensation of a saturated dibasic acid and glycols. For example, a polyethylene terephthalate (hereinafter, referred to as PET) obtained from ethylene glycol and terephthalic acid is used. Abbreviated), phthalic acid, isophthalic acid, sepasic acid, adipic acid, azelaic acid, glutaric acid, succinic acid, a polyethylene terephthalate copolymer having a saturated dibasic acid such as oxalic acid as a copolymer component, and as a diol component, 1,4
-Cyclohexane dimethanol, diethyl glycol,
It refers to a polyethylene terephthalate copolymer containing propylene glycol or the like as a copolymer component or a film obtained by forming a blend thereof. The PET is not a commonly used biaxially stretched so-called O-PET film, but a non-stretched film formed by melt extrusion or calentan rolling, and has a thickness of 20 to 300 μm.
m and a light transmittance (ASTM D-1003) of 85% or more. A butyl acrylate copolymerized polymethyl methacrylate, which is a second constituent of the surface film, and a resin layer (hereinafter referred to as a BA-PMMA layer)
A film made of a resin copolymerized with butyl acrylate instead of an MMA resin.
A film having a thickness of 00 μm and a light transmittance of 85% or more. The PET layer and the BA-PMMA layer are separately formed into a film, and then may be laminated with an adhesive, or may be formed through an adhesive resin layer by a co-extrusion method. It does not specify the adhesive resin.

[0005]

The surface transparent sheet of the present invention is printed on the surface of the lower colored sheet 3 of the composite sheet 2 for construction, which is affixed to the substrate 1 for the purpose of improving design and durability, as shown in the schematic sectional view of FIG. In general, it is used after being bonded to the surface of the patterned layer 4 and having an uneven embossed surface as shown in the section of the prior art. The function of the surface transparent sheet 5 which is an object of the present invention has a role of protecting the lower print pattern layer 4 and at the same time improving the depth of printing in design. The PET layer 6, which is the upper layer of the surface transparent sheet 5, is superior to the conventionally used semi-rigid transparent PVC in terms of weather resistance and transparency, but is a lower colored sheet provided with a lower printed pattern. There is a problem in the adhesive strength to No. 3. In general, a semi-rigid PVC sheet is used as a model of the lower colored sheet 3, but a model other than the semi-rigid PVS, for example, A
For BS resin, rigid PVC, PMMA resin, etc.,
It is hardly possible to bond to a saturated polyester resin of the same material by heat. Further, even through a thermosetting adhesive generally called a dry laminating adhesive such as polyester urethane, polyether urethane or epoxy polyurethane, the adhesive strength is not sufficient. Surface transparent sheet 5
The BA-PMMA layer 7, which is a lower layer constituting layer, has a function of improving adhesion to the lower colored sheet 3 on which a lower printed pattern is formed. The model of the lower colored sheet 3 is semi-rigid PV
C, rigid PVC, ABS resin, and PMMA resin can be bonded by heat and dry lamination as described above. The BA-PMMA layer 7 has two main functions of heat-fusing property and improvement of the wettability of the adhesive in the case of dry lamination, but the weather resistance of the BA-PMMA itself is also different, for example, from a polyurethane-based adhesive or a polyurethane adhesive. Excellent compared to modified polyolefin adhesives. PET layer, BA-PM
The MA layer has the same or better workability as the semi-rigid PVC transparent sheet in terms of vacuum formability, bending workability, especially in that no whitening phenomenon occurs at the bending line portion during bending, cold drawability, etc. I was able to do it.

[0006]

【Example】

Example 1 The first layer was made of a polyester resin DC-0 manufactured by Mitsubishi Rayon Co., Ltd. by a co-extrusion method and a T-die extruder.
03 is a second layer as an adhesive resin layer, and Admer VF-500 manufactured by Mitsui Petrochemical Co., Ltd. is a third layer. Mitsubishi Rayon Co., Ltd. is a third layer.
Butyl acrylate copolymerized polymethyl methacrylic resin was co-extruded into a film, and the thickness ratio was 70:10:20 for a total of 1
A transparent film of 00 μm was obtained. Example 2 PET-manufactured by Eastman Kodak Company was extruded with a T-die and a single-layer extruder to obtain a 50 μm PET film. Separately, the thickness of butyl acrylate copolymerized polymethylmethacrylic (Sanduren manufactured by Kaneka-buchi Chemical) is 3
Prepare a 5μ film, dry laminate two kinds of film by dry lamination method, PET / BA-PM
An MA2 layer film was obtained. << Comparative Example 1 >> DOP as a plasticizer by the calendar method
Polyvinyl chloride (polymerization degree: 70)
0) Resin and lubricant were added to the resin of 2.0) and 1.0, respectively.
PHR was added to obtain a semi-rigid PVC transparent film having a thickness of 100 μm. << Comparative Example 2 >> A polyester resin DC-003 manufactured by Mitsubishi Rayon Co., Ltd. was extruded with a T-die single layer extruder to obtain a transparent PET film having a thickness of 100 µm.

Table 1 shows the evaluation results of the examples and the comparative examples. Cl content: A planned chlorine content (%) in the composition. Thermal fusibility: Semi-rigid PVC sheet 100μ for lower colored layer
When m was used, the adhesion after pressing at 150 ° C. and 5 kg / cm ² for 3 seconds was shown in kg / cm width. Whitening property: The whitening state of the bending line when bent at 180 ° C. was observed. Weather resistance: Irradiation was performed on a sunshine weatherometer for 200 hours, and the dyes before and after were indicated by ΔE values.

[0008]

According to the present invention, the surface transparent film for building obtained by the present invention does not generate hydrochloric acid gas upon burning which is a drawback of the conventionally used semi-rigid PVC sheet, and at the same time, the conventional semi-rigid P.S.
Good workability such as laminating process, vacuum forming process, drawing process, bending process, etc., which was not obtained by other than the VC sheet. Further, it is possible to obtain a sheet which is superior in bending whitening property and weather resistance to a semi-rigid PVC transparent sheet. did it.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a usage example of the present invention.

FIG. 2 is a schematic sectional view of a surface transparent sheet of the present invention.

[Explanation of symbols]

1: base material 2: composite sheet for construction bonded to the base material 3: lower colored sheet 4: printed pattern layer 5: surface transparent sheet of the present invention 6: PET layer of the upper constituent layer 7: BA of the lower constituent layer -PMMA layer 8: uneven emboss

Claims (1)

(57) [Claims] 1. A plywood or consisting particle board <br/> wood substrate, or a steel plate or the outermost layer of the construction wearing composite sheet is bonded to the design properties and durability on the surface of a metal substrate made of aluminum plate A transparent sheet for building use having a two-layer structure of a saturated polyester resin layer and a butyl acrylate copolymerized polymethyl methacrylic resin layer.